NO
* Step 1: UnsatPaths NO
    + Considered Problem:
        Rules:
          0. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f2(A,B,C,D,E,F,G,H,S,T,U,V,W,Y,H,H,H,X)   [H >= 1 && G >= 1 + F && 255 >= H] (?,1)
          1. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f2(A,B,C,D,E,F,G,H,S,T,U,V,W,Y,H,H,H,X)   [H >= 1 && G >= 1 + F && H >= 257] (?,1)
          2. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f3(A,B,C,D,E,F,G,H,S,T,K,L,M,N,0,0,0,R)   [F >= G]                           (?,1)
          3. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f1(A,B,C,D,E,F,G,H,S,T,U,V,W,N,O,P,Q,R)   [G >= 1 + F && 0 >= H]             (?,1)
          4. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f1(A,B,C,D,E,F,G,256,S,T,U,V,W,Y,O,P,Q,R) [G >= 1 + F && X >= 1 && H = 256]  (?,1)
          5. f300(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R) -> f1(S,T,U,V,W,F,G,H,I,J,K,L,M,N,O,P,Q,R)   True                               (1,1)
        Signature:
          {(f1,18);(f2,18);(f3,18);(f300,18)}
        Flow Graph:
          [0->{},1->{},2->{},3->{0,1,2,3,4},4->{0,1,2,3,4},5->{0,1,2,3,4}]
        
    + Applied Processor:
        UnsatPaths
    + Details:
        We remove following edges from the transition graph: [(3,0),(3,1),(3,2),(3,4),(4,0),(4,1),(4,2),(4,3)]
* Step 2: FromIts NO
    + Considered Problem:
        Rules:
          0. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f2(A,B,C,D,E,F,G,H,S,T,U,V,W,Y,H,H,H,X)   [H >= 1 && G >= 1 + F && 255 >= H] (?,1)
          1. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f2(A,B,C,D,E,F,G,H,S,T,U,V,W,Y,H,H,H,X)   [H >= 1 && G >= 1 + F && H >= 257] (?,1)
          2. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f3(A,B,C,D,E,F,G,H,S,T,K,L,M,N,0,0,0,R)   [F >= G]                           (?,1)
          3. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f1(A,B,C,D,E,F,G,H,S,T,U,V,W,N,O,P,Q,R)   [G >= 1 + F && 0 >= H]             (?,1)
          4. f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)   -> f1(A,B,C,D,E,F,G,256,S,T,U,V,W,Y,O,P,Q,R) [G >= 1 + F && X >= 1 && H = 256]  (?,1)
          5. f300(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R) -> f1(S,T,U,V,W,F,G,H,I,J,K,L,M,N,O,P,Q,R)   True                               (1,1)
        Signature:
          {(f1,18);(f2,18);(f3,18);(f300,18)}
        Flow Graph:
          [0->{},1->{},2->{},3->{3},4->{4},5->{0,1,2,3,4}]
        
    + Applied Processor:
        FromIts
    + Details:
        ()
* Step 3: CloseWith NO
    + Considered Problem:
        Rules:
          f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)    -> f2(A,B,C,D,E,F,G,H,S,T,U,V,W,Y,H,H,H,X)     [H >= 1
                                                                                                     && G >= 1 + F
                                                                                                     && 255 >= H]
          f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)    -> f2(A,B,C,D,E,F,G,H,S,T,U,V,W,Y,H,H,H,X)     [H >= 1
                                                                                                     && G >= 1 + F
                                                                                                     && H >= 257]
          f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)    -> f3(A,B,C,D,E,F,G,H,S,T,K,L,M,N,0,0,0,R)     [F >= G]
          f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)    -> f1(A,B,C,D,E,F,G,H,S,T,U,V,W,N,O,P,Q,R)     [G >= 1 + F
                                                                                                     && 0 >= H]
          f1(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)    -> f1(A,B,C,D,E,F,G,256,S,T,U,V,W,Y,O,P,Q,R)   [G >= 1 + F
                                                                                                     && X >= 1
                                                                                                     && H = 256]
          f300(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R)  -> f1(S,T,U,V,W,F,G,H,I,J,K,L,M,N,O,P,Q,R)     True
        Signature:
          {(f1,18);(f2,18);(f3,18);(f300,18)}
        Rule Graph:
          [0->{},1->{},2->{},3->{3},4->{4},5->{0,1,2,3,4}]
    + Applied Processor:
        CloseWith False
    + Details:
        ()

NO